When using coordinates, you need to specify a radius so that it knows how far to search from that specific point. Try changing your command to:

/testfor @a[x=-611,y=80,z=714,r=1]

You can also compact it down into:

/testfor @a[-611,80,714,1]

I believe that the reason is that without a radius the command block will not actually update its output, as the command block does not see the nonsensical command as either failing or succeeding.

When using coordinates, you need to specify a radius so that it knows how far to search from that specific point. Try changing your command to:

/testfor @a[x=-611,y=80,z=714,r=1]

You can also compact it down into:

/testfor @a[-611,80,714,1]

I believe that the reason is that without a radius the selector makes no sense, so it is simply ignored and tests for @a.

When using coordinates, you need to specify a radius so that it knows how far to search from that specific point. Try changing your command to:

/testfor @a[x=-611,y=80,z=714,r=1]

You can also compact it down into:

/testfor @a[-611,80,714,1]

When using coordinates, you need to specify a radius so that it knows how far to search from that specific point. Try changing your command to:

/testfor @a[x=-611,y=80,z=714,r=1]

You can also compact it down into:

/testfor @a[-611,80,714,1]

I believe that the reason is that without a radius the command block will not actually update its output, as the command block does not see the nonsensical command as either failing or succeeding.